1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ankoles [38]
3 years ago
13

PLEASE ANSWERRRRRRRRRR

Mathematics
1 answer:
loris [4]3 years ago
5 0

Answer:

the slope is 2/1x

Step-by-step explanation:

20/10 simplified is 2/1.

You might be interested in
Plz help i can’t figure it out
Ivan

Answer:

-(x-10)=7

-x+10=7

-x=7-10

-x=-3

x=3

5 0
4 years ago
Read 2 more answers
Regan earned a total of 15 by selling 5 cups of lemonade how many cups of lemonade does Reagan need to sell and altar on $42 ass
Gemiola [76]
Idk if its right sorry

8 0
3 years ago
What is a solution and what is not?
Ksenya-84 [330]
Cant see the rest of the question ;-;
3 0
3 years ago
Nick can run the 440 yard dash in 55 seconds, and Jack can run it in 88 seconds. How great a handicap must Nick give Jack for th
Zepler [3.9K]
Jack --> 440 = rate * 88Jack --> 5 yrds/sex = rateJack in 55 seconds --> distance = 5 * 55 = 275 yrds440 - 275 = 165 yards handicap.
8 0
3 years ago
If n is a positive integer, how many 5-tuples of integers from 1 through n can be formed in which the elements of the 5-tuple ar
Oksana_A [137]

Answer:

n + 4 {n \choose 2} + 6 {n \choose 3} + 4 {n \choose 4} + {n \choose 5}

Step-by-step explanation:

Lets divide it in cases, then sum everything

Case (1): All 5 numbers are different

 In this case, the problem is reduced to count the number of subsets of cardinality 5 from a set of cardinality n. The order doesnt matter because once we have two different sets, we can order them descendently, and we obtain two different 5-tuples in decreasing order.

The total cardinality of this case therefore is the Combinatorial number of n with 5, in other words, the total amount of possibilities to pick 5 elements from a set of n.

{n \choose 5 } = \frac{n!}{5!(n-5)!}

Case (2): 4 numbers are different

We start this case similarly to the previous one, we count how many subsets of 4 elements we can form from a set of n elements. The answer is the combinatorial number of n with 4 {n \choose 4} .

We still have to localize the other element, that forcibly, is one of the four chosen. Therefore, the total amount of possibilities for this case is multiplied by those 4 options.

The total cardinality of this case is 4 * {n \choose 4} .

Case (3): 3 numbers are different

As we did before, we pick 3 elements from a set of n. The amount of possibilities is {n \choose 3} .

Then, we need to define the other 2 numbers. They can be the same number, in which case we have 3 possibilities, or they can be 2 different ones, in which case we have {3 \choose 2 } = 3  possibilities. Therefore, we have a total of 6 possibilities to define the other 2 numbers. That multiplies by 6 the total of cases for this part, giving a total of 6 * {n \choose 3}

Case (4): 2 numbers are different

We pick 2 numbers from a set of n, with a total of {n \choose 2}  possibilities. We have 4 options to define the other 3 numbers, they can all three of them be equal to the biggest number, there can be 2 equal to the biggest number and 1 to the smallest one, there can be 1 equal to the biggest number and 2 to the smallest one, and they can all three of them be equal to the smallest number.

The total amount of possibilities for this case is

4 * {n \choose 2}

Case (5): All numbers are the same

This is easy, he have as many possibilities as numbers the set has. In other words, n

Conclussion

By summing over all 5 cases, the total amount of possibilities to form 5-tuples of integers from 1 through n is

n + 4 {n \choose 2} + 6 {n \choose 3} + 4 {n \choose 4} + {n \choose 5}

I hope that works for you!

4 0
3 years ago
Other questions:
  • Could a triangle have side lengths of 1.2 ft 1.9ft and 3.1 ft
    13·1 answer
  • togather Preston and Horatio have 49 video games Horatio has 11 more games than Preston how many games does each person have
    14·1 answer
  • what is 3/4 times 1/5 simplified, what is 4/7 times 5/12 simplified, what is 3/8 times 2/9 simplified, what is 4/5 times 5/8 sim
    13·2 answers
  • Is the system of equations is consistent, consistent and coincident, or inconsistent? y=−x+12y=−2x+2 Select the correct answer f
    10·2 answers
  • The center of a hyperbola is (−3,2). The length of the conjugate axis is 8 units, and the length of the transverse axis is 12 un
    10·1 answer
  • A horse can run at a top speed of 18 miles
    9·1 answer
  • Please help me with these question.
    8·2 answers
  • In a random sample of 7 residents of the state of Maine, the mean waste recycled per person per day was 1.4 pounds with a standa
    5·1 answer
  • The lines 5x+2y=14 and y=-5x+9 are?<br> A: Parallel<br> B: Perpendicular <br> C: Neither
    14·1 answer
  • Select the correct days. Gina tracks the low temperatures for a city over six days. Identify the days colder than -1.75°F. I WIL
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!